#include <iostream>
const char * qualify[4] = {
	"a",
	"b",
	"c",
	"d"
};
int main(int argc, char const *argv[])
{
	using namespace std;
	int age;
	cout << "Enter your age in year :" ;
	cin>>age;
	int index;
	if (age >17 && age >35)
	{
		index =0;
	}else if (age >= 35 && age <50)
	{
		index =1;
	}else if (age >=50&& age <65)
	{
		index =2;
	}else{
		index =3;
	}
	cout << "your age is " << qualify[index]<<endl;
	return 0;
}